I am trying to get a value outside of an anonymous function in Javascript. Basically, I want this function to return 4. I feel like there is an easy fix but I am unsure. Thanks!
function a(){
var x = 1;
()=>{
x = 4;
}
return x;
}
3 Answers
You have to invoke the inner function, but since it's anonymous, it has to become an immediately invoked function expression. And, since there is only one statement in the anonymous function, you can omit the curly braces if you like.
function a(){
var x = 1;
(() => x = 4)();
return x;
}
console.log(a());
Comments
Pretty weird that you'd want to do this, but just make sure you call the inner function. This can be done using the Immediately-invoked function expression syntax.
function a(){
var x = 1;
(()=>{
x = 4;
})()
return x;
}
console.log(a());Comments
Your example defines a function, but nothing is running it. Perhaps try using an IIFE:
function a(){
var x = 1;
(()=>{
x = 4;
})();
return x;
}
2 Comments
Khauri
The last set of parenthesis ()` should be on the outside otherwise you'll get an error.
Alex McMillan
Thanks, updated. This was never the case before fat arrow syntax ;)
return 4? Please post your actual code.